(b) The Internal Revenue Code, so far as made operative by this chapter, is a statute adopted and incorporated by reference. The Internal Revenue Code shall be applied using changes in nomenclature and other language, including the omission of inapplicable language, where necessary to effectuate the intent of this section. References to the following terms in the Internal Revenue Code shall have the following meanings: "Interest at the underpayment rate" or "interest at the overpayment rate" means the interest rate set forth in section 231-39(b)(4) or section 231-23(d)(1), as the case may be.
"Secretary or his delegate" means the director of taxation or the director's duly authorized subordinates.